Nova-Tech 4085 TRACEABLE HUMIDITY_TEMPERATURE DEW POINT METER - Manual

Traceable ® is a registered trademark of Control Company ©2009 Control Company. 92-4080-20 Rev. 3 042109
MODEL Universal Model
4080 Basic Model 4083 Fast Response 4085
Range 10.0 to 95.0% 10.0 to 95.0% 5.0 to 95.0%
Accuracy ±1.5% ±1.5% ±1.5%
Resolution
0.01 on all readings
below 100, 0.1 on all
readings above 100
0.1 0.01 on all readings below
100, 0.1 on all readings
above 100
Humidity
Response
Time
30 sec to 3½ min 30 sec to 3½ min approx. 10 sec
Range
–40.00 to 220.0°F
(–40.00 to 104.4°C)
–40.0 to 220.0°F
(–40.0 to 104.4°C)
–40.00 to 220.0°F
(–40.00 to 104.4°C)
Accuracy
±0.4°C (0-40°C)
otherwise 1°C.
±0.4°C (0-40°C)
otherwise 1°C.
±0.4°C (0-40°C)
otherwise 1°C.
Temperature
Resolution
0.01 on all readings
below 100, 0.1 on all
readings above 100
0.1 0.01 on all readings below
100, 0.1 on all readings
above 100
Range
–40.00 to 140.0°F
(–40.00 to 60.00°C)
–40.0 to 140.0°F
(–40.0 to 60.0°C)
–40.00 to 140.0°F
(–40.00 to 60.00°C)
Dew Point
Resolution
0.01 on all readings
below 100, 0.1 on all
readings above 100
0.1 0.01 on all readings below
100, 0.1 on all readings
above 100
Probe Diameter 0.7² (1.8 cm), 0.7² (1.8 cm) 0.4² (1 cm)
Display: 3/8” four-digit LCD featuring RH, °F, °C, DP, MEM, ALM, and
BAT indicators
Size, weight: 5¾ x 3-9/16 x 15/16”, 12 oz (14.6 x 9 x 3.3 cm, 340 grams)
Sensors: Humidity: precision, thin-film capacitance
Temperature: Thermistor
Power: Replaceable 9-volt battery supplied low battery indicator
on display
Case: High-impact, chemical-resistant ABS plastic
Controls: ON/OFF, HOLD/SCROLL, DISPLAY/MEM/ALM, CLEAR
MEM/ALARM OFF/SET
Certification: Traceable® to National Institute of Standards and
Technology (NIST) from our A2LA accredited calibration lab
Accessories available: Adaptor, NiCad battery, data cable, parallel-to-serial converter,
QUICK REFERENCE
ON/OFF button turns unit on and off.
HOLD/SCROLL button alternates between the Auto Scroll mode and the Hold mode.
When the unit is initially turned on it will be in the Auto Scroll mode. It displays a reading,
pauses, then scrolls to the next measurement. Press HOLD button to stop the scrolling
and the display will read only the present measurement.
DISPLAY/MEM/ALM button switches between viewing current readings, high/low
memory recordings, and high/low alarm set points for relative humidity (RH),
temperature (°F, °C), and dew point (DP °F, DP °C).
CLEAR MEM/ALM OFF/SET button permits clearing the memory settings, turning off a
sounding alarm, and setting an alarm.
RH, TEMPERATURE, AND DEW POINT MEASUREMENT
1. Turn unit on by pressing the ON/OFF button.
2. Unit automatically begins scrolling through measurements for relative humidity,
temperature, and dew point. Indicators ( RH; °F, °C; DP °F, DP °C) appear on the
display to denote the current measurement.
3. Freeze the display at the desired measurement by pressing the HOLD button.
Display “freezes” at the desired measurement while the unit continues sampling.
4. Place probe near the substance to be measured and read display.
5. Return to Auto Scroll mode by pressing the SCROLL button.
6. Press ON/OFF button to turn unit off. This resets all stored memories and alarms.
MEMORY RECALL OPERATION
Unit’s memory function permits viewing the highest and lowest readings stored in
memory for relative humidity, temperature, and dew point. “HI” appears on the display
indicating highest reading stored, and “LO” appears on the display indicating lowest
reading stored. All measurements (relative humidity, temperature, and dew point) are
constantly scanned. If a new high or low reading is achieved while in the Display,
Memory, or Alarm modes, the reading is automatically captured and is available for
display.
Displaying highest/lowest memory readings
1. Press MEM button until the word “MEM” appears in the lower, right-hand corner of
the display. Unit is now in Memory mode.
2. If the unit is in Auto Scroll mode when the Memory mode is activated, the display will
scroll through the highest and lowest readings recorded for relative humidity (RH),
temperature (°F, °C), and dew point (DP °F, DP °C).
3. If the unit is in Hold mode when the Memory mode is activated, the highest reading
recorded for that specific measurement will be displayed. Press the SCROLL button
to return to the Auto Scroll mode and then press the HOLD button at any time to
“freeze” the display at a particular measurement.
Clearing memory readings
1. Verify the unit is in Memory mode by checking to see if the word “MEM” appears on
the display. If the unit is not in Memory mode, press the MEM button until “MEM”
appears on the display.
Note: Memories may only be cleared while the unit is in Memory mode and “MEM”
appears on the display.
2. While the unit is in Memory mode, press the CLEAR MEM button to reset all of the
memory settings. Memory settings will automatically reset to the current readings for
relative humidity, temperature, and dew point.
3. Exit the Memory mode and return to normal Display mode by pressing the MEM
button twice.
ALARM OPERATION
High and low alarm set points may be entered in any 0.1 increment for relative humidity,
temperature, and dew point measurements. When an alarm set point is tripped, an
audible alarm sounds constantly for 1 minute, unless turned off manually, and then
sounds once every minute to conserve battery life. After the first minute, a visual alarm
appears on the display as a flashing “ALM”. The alarm will sound if an out-of-range
condition exists irrespective of the measurement being displayed.
Setting an alarm
1. Press the ALM button until “ALM” appears on the display to indicate the unit is in
Alarm mode.
2. If the unit is in Auto Scroll mode when the Alarm mode is activated, the display will
scroll through the high (“HI”) and low (“LO”) alarm settings for relative humidity,
temperature, and dew point.
3. If the unit is in Hold mode when the Alarm mode is activated, the high alarm setting
for that specific measurement will be displayed. Press the SCROLL button to return
to the Auto Scroll mode and then press the HOLD button at any time to “freeze” the
display at a particular alarm setting.
4. Once the desired unit of measurement appears on the display, press the HOLD
button to “freeze” the display if necessary.
5. Press the SET button to advance the display in increments of 0.1. For rapid
advancement, press and hold the SET button.
6. Once the desired alarm set point has been entered, exit the Alarm mode by pressing
the ALM button and return to normal Display mode. Alarm is now activated and will
sound if an out-of-range condition occurs.
Note: When setting an alarm in degrees Celsius, the units advance unevenly because
the units are being advanced internally in the Celsius equivalent of 0.1° Fahrenheit.
Alarm set points may be entered in °F or °C but they must be equivalent.
Note: Very rapid changes in humidity and temperature may cause the dew point alarm
to sound a false alarm. A “phantom” sensed out-of-range dew point alarm may be
triggered by either the humidity sensor or temperature sensor sensing a change faster
than the other. (Example: instantly taking the probe from a 70°F, 80% RH environment
to a 20°F, 5% RH environment may trigger a false alarm.) This may be eliminated by
lowering the alarm set point for dew point or by turning the unit off and, after the probe
reaches an equilibrium, turning it back on.
Silencing an active alarm
Once an alarm set point is triggered, the alarm will continue to sound and flash until
turned off (even if the measurement value returns to an in-range condition). Silence an
active alarm by pressing the ALM OFF button in any measurement or any mode. The
alarm will NOT trip again until the current value passes through the alarm set point and
again is within a normal (non-alarm) range.
Example: If the RH “HI” alarm is set at 80.10 and the current reading is 80.20, the
alarm will sound. After the ALM OFF button is pressed, the alarm will be silenced and
will not be triggered again until the RH falls below 80.10 (resetting the alarm) and
then rises above the set point to 80.20 (triggering the alarm).
To determine which setting caused an out-of-range alarm, display the memory’s high
and low values and search for a value that is beyond the alarm set point.
TRACEABLE ® HUMIDITY/TEMPERATURE DEW POINT METER INSTRUCTIONS