AMC VersaTox, Инструкция по эксплуатации

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INTO CAL JACK
INSERT PLUG
REMOTE
CALIBRATION
LEAD
mA
DC
mA Com
MULTIMETER
DIGITAL
(DC CURRENT MODE)
CALIBRATION ADAPTER
ZERO & SPAN GASES
CLEAN CLOTH
GAS SENSOR
CAL JACK ADAPTER
SPAN TRIMMER
ZERO TRIMMER
COM TEST POINT
ON THE TOP EDGE
OF THE BOARD
SIG TEST POINT
ON THE TOP EDGE
OF THE BOARD
V
DC
V Com
MULTIMETER
DIGITAL
(DC VOLTAGE MODE)
100
Figure 5-1 Calibration Procedure
5.3 ALARM RELAY TRIP POINT SETTING
The alarm relay trip point is user settable. The trip point is settable within the full range for the
sensor. Zero concentration is 0.4 VDC and full scale concentration is 2.0 VDC. If the desired trip
point is half scale, the alarm would be set at 1.2 VDC. Below are a table and a graph that depict
commonly used PPM ranges.
Alarm Relay Trip Point Procedure
1. Determine the trip point in volts using either the table or graph below.
2. Switch-ON multi-meter and select DC volts range to read greater than 1.00 VDC.
3. Connect multi-meter to relay, power board as shown in Figure 5-3.
4. Adjust the Alarm Adjust trimmer to the desired trip point.