Physitemp Instruments BAT-10 - Manual (Page 8)

When using BAT-10 for differential measurements not centered on the 40°C reference, a correc-
tion must be introduced to accomodate changes in sensitivity and linearization at different refer-
ence temperatures.
In general, differential measurements are quite correct when the difference reading is small and
both sensors are in the 20-60°C range. A correction is required when: (a) differences greater than
1°C are to be measured (b) both sensors are not within 20-60°C (c) when measurements are not
centered on the 40°C reference. Calculation of true temperature can be made with reference to
Appendix 1.
Note: Input - the digital display warning for open or faulty probe is inactive in the differential
mode (DIFF)
Consult factory for further technical information and details in specific applications.
6.0 AUXILIARY OUTPUT CONNECTOR (optional)
6.1 The 9-pin D-shell connector on the back panel is used for the
following auxiliary connections:
All signals are with respect to digital ground unless otherwise specified
• Non-linearized analog output, with respect to analog ground (see Section 7.1)
• Linearized analog output, optional (see Section 7.2)
• Data True: A gating signal, active low. The number of oscillator pulses during this
period is four times the count displayed
For example: Display reads 38.1°C = 381 counts
Number of oscillator pulses in the data true period is 381x4=1524
• Oscillator output: 53KHz (±20%)
• Alarm input: User supplied signal, active low. 5V logic level
• Sign out: Low when negative
• Analog common
• Digital common
• V+: Positive supply
Consult factory for further information: (Phone 973-779-5577)
5
Connection diagram:
5
9 6
1
PIN # FUNCTION
1 Non-linear Analog output
2 Data True
3 Oscillator Output
4 Alarm In
5 Sign Out
6 Linear Analog Output
7 Analog Common
8 Digital Common
9 V+