QTS-6000 Series
Analog Transmitter/Sensor
B71050-021-000-RB.doc
ELECTROCHEMICAL TRANSMITTER
JUL. 18, 2007
PRODUCT MANUAL
12
8.1.2 P
ROCEDURE
8.1.2.1 Set-Up
Two small jacks are on the upper CCA of the transmitter, accessible through holes on the cover plate (see
figure 8). These jacks will accept standard test leads from most hand held multimeters. Set the digital
multimeter on a DC milliamp range to read up to 20 mA DC and connect the test leads to the test jacks.
The circuit is diode protected, so as to allow measurement without interruption of the transmitter output.
Connect the tubing between the flow regulator and the calibration adapter.
NOTE:
Adjustments to the zero potentiometer will effect the span adjustment. Adjustments
to the span potentiometer will have a negligible effect on the zero adjustment unless
they are major. Ideal calibration will be obtained by repeating the following zero
and span adjustments twice.
Test Jacks
Figure 8 - Calibration Adjustments
8.1.2.2 Zero Adjustment
A) Connect the flow regulator to the zero calibration gas cylinder (or other clean air source).
B) Connect the calibration adapter to a) the sensor assembly cover if the industrial explosion-proof
enclosure or b) the sensor opening on the front cover if the ABS plastic enclosure.
C) Apply zero calibration gas while monitoring the output of the sensor. Allow output to stabilize.
D) Adjust the zero potentiometer until the signal is 4.00 mA DC,
±
0.05 mA.
E) Turn off the zero gas and remove from the flow regulator.
