HF scientific MicroTUV Online UV %Transmission Analyzer - Manual (Page 10)

TUV (1/03)
REV. 0.2
2.4.4 Analyzer Recorder - Voltage
Recorder output voltage is selected at the terminal block labeled ANALOG VOLTAGE (J6). Only one of these
voltages is to be selected at any time.
The recorder load for each voltage is:
Terminal 1
0 - 10V 50000 ohms or greater
Terminal 2 0 - 1V 5000 ohms or greater
Terminal 3 0 - 100mV 500ohms or greater
Terminal 4 Common
2.4.5 Analyzer Recorder - Current
A 4 - 20 mA current output is available. The connections are made at the terminal block labeled Analog 4 -
20 mA (J5). The recorder load may be rated from 0-1000 ohms maximum. Terminal #1 is positive; terminal
#2 is negative.
2.4.6 Analyzer Alarm Contacts
Connections are provided to the alarm relay contacts on the terminal block labeled ALARMS.
NOTE: These are “fail safe” and will revert to an “alarm” condition should the power
be disconnected, for any reason.
Refer to the Specifications to ensure that alarm contact ratings are not exceeded.
NOTE:
ALARM 1:
Terminal Block J1
ALARM 2: Terminal Block J2
SENSOR ALARM: Terminal Block J3
The following are the connections for each of the relay contacts: (Refer to Figure 4)
Terminal 1: Normally Closed (N.C.) (Open on Alarm)
Terminal 2: Normally Open (N.O.) (Closed on Alarm)
Terminal 3: Common (C)
WARNING: Ensure that all external voltages in excess of 30 volts are disconnected before attempting
to make connections or disconnections from alarm terminal blocks.
NOTE:For external Analyzer connection, other than power, #14 AWG is the largest wire the connecting
terminals will accept.
3.0 OPERATION THEORY
The TUV Analyzer is specifically designed to operate with the TUV Sensor/Sampler to comprise a
complete "system". The TUV Analyzer performs all of the automated control functions. The Sensor/
Sampler communicates with the Analyzer through an RS 485 data port.
Once every 30 seconds, the Analyzer will ask the Sensor/Sampler for the latest reading. This reading will be
processed. The processed value will be posted to the graph, to the readout display and to the 4-20mA or 0-10
V output. If the reading exceeds an alarm point, an alarm will be triggered.
Menu's are provided for the user to customize setups such as the alarm set points and time between calibrations.
These menus are quite self-explanatory. To exit out of any menu press the menu button. Refer to figure 5.
Page 4