Manual Calibration - Teledyne OLCT 10 N User Manual

OLCT 10 N
DIGITAL GAS DETECTOR
USER MANUAL

3.4 Manual calibration

A voltmeter and the female connector provided by TELEDYNE OLDHAM SIMTRONICS (P/N
6116291) are required.
1. Remove the detector cover.
2. Connect the connector to the circuit's male connector
3. Connect the voltmeter between S+ and S- (value in mV)
Zero the sensor
1. Ensure that the sensor is in clean air (in absence of O2 in the case of OLCT 10N O2). If not,
inject zero air (Nitrogen in the case of an OLCT 10N O2) into the sensor at a flow rate of 1
l/min, then wait for voltmeter signal to stabilize (use the calibration gas kit: zero air cylinder,
calibration cap, tube).
2. Adjust the zero with the potentiometer's ZERO until the voltmeter reads 0 mV.
Sensitivity
1. Now inject the calibration gas (1 l/min) into the sensor. Wait for the voltmeter signal to
stabilize (use the calibration gas kit: calibration gas cylinder, calibration cap, tube).
2. Adjust the sensitivity if necessary with the potentiometer "SENS" until the signal value (in mV)
corresponds to the concentration in the reference gas used. Use the following formula to
calculate the correct value for the signal.
3. Stop injecting gas (remove the calibration pipe from the sensor).
4. Wait for the voltmeter to "return to zero".
U
(mV) =
V
GND
S-
S+
VCC
OLCT 10N connector - P/N 6116291
14
1600 x reference gas concentration
measurement scale
SENS
ZERO
OLCT 10N
NPO10NGB
Revision J.1