User manual

29
MC-III™ EXP Flow Analyzer Section 2
Remote Reset Input
The remote reset input allows the operator to reset the accumulated volume on the MC-III EXP to zero
without opening the enclosure. This input is optically isolated. The input is shown connected in two ways,
with a power supply and switch in a safe area (Figure 2.11), and with a pulse generator in a safe area (Figure
2.12). The remote reset input can also be controlled with an optional explosion-proof switch mounted in
the top of the enclosure. See Explosion-Proof Reset/Control Switch, page A-1, for installation and wiring
instructions.
The reset input, reset pulse, or local reset switch must be active for 3 seconds to clear the total. (The
explosion-proof switch can also be used to view daily logs and to save the accumulated volume to memory
without opening the enclosure. See Explosion-Proof Reset/Control Switch, page 15, for more information.)
TB1
PULSE
INPUT
RESET
INPUT
TFM
A&S
GND
TB
3
EXT POWER
6
-
3
0
V
D
C
J1
J2
RESET
SWITCH
BATTERY
POWER SUPPLY
3 to 30 VDC
Figure 2.11—Reset input wiring (when power supply and reset switch are in a safe area)
TB1
PULSE
INPUT
RESET
INPUT
TFM
A&S
GND
TB
3
EXT POWER
6
-
3
0
V
D
C
J1
J2
RESET
SWITCH
BATTERY
RESET PULSE
3 TO 30 VDC
Figure 2.12—Reset pulse input wiring (when pulse generator is in a safe area)