7-7
Chapter 7. SPECIFICATIONS
Model No.
Item
MQV0050 MQV0200
Totalizing
function
Display range
0 to 99,999,999 L
0.01 to 999,999.99 m
3
Display resolution 1 L 0.01m
3
Totalized count
backup timing
(1) Every 500 L (1) Every 2 m
3
(2) Every hour from the previous backup
(3) At the time the RUN key is pressed.
Analog
output
Output type
Instantaneous flow rate (PV) output or setting flow rate (SP) output (switchable)
Output scale 0 to full-scale flow rate (scale can be changed.)
Output range 0 to 5 V DC/1 to 5 V DC/0 to 20 mA/4 to 20 mA (switchable)
Max. output 7 V DC max./28 mA max. (max. output when flow rate exceeds range)
Accuracy Total output accuracy ±0.3% FS Indication accuracy ±0.3 % FS
External load
resistance
Voltage output type: 250 kΩ min. Current output type: 300 Ω max.
Alarm/
event
output
Number of outputs Alarm output: 1, Event output: 2
Output rating 30 V DC, 30 mA max. (open collector non-insulated output)
Totalized pulse output width
100 ms ±10 % (when pulse output is selected in the function setup)
Totalized pulse output rate
1 L /1 pulse 0.01 m
3
/1 pulse
External
switching
input
Input type, number
of inputs
External 3-way switching input (OPEN/GND/5V): 1
External contact input (2-way switching): 3
Required circuit type Non-voltage contact, or open collector
Contact OFF termi-
nal voltage
External 3-way switching input: 2.5 ±0.5 V
External contact input: 2.8 ±0.5 V
Contact ON terminal
current
Approx. 0.5 mA (current flowing to contact)
Allowable ON con-
tact resistance
250 Ω max.
Allowable OFF con-
tact resistance
100 kΩ min.
Allowable ON re-
sidual voltage
1.0 V max. (open collector type)
Allowable OFF leak-
age current
50 μA max. (open collector type)
Reference
voltage
output
Output rating 5.0 V DC ±5 %, 5 mA max.
Application Reference voltage of flow rate setting voltage and 5 V input of external
3-way switching input
Communications
Mode (1) MLP loader communications *
5
(2) RS-485 communications (3-wire system) *
6
Transmission speed 2400, 4800, 9600, 19200, 38400 bps
(only 19200 bps for loader communications )
Power Rating 24 V DC, current consumption: 300 mA max.
Allowable power
voltage range
21.6 to 26.4 V (ripple 5 % max.)
Isolation The power circuit is isolated from the input/output circuit.
Material of gas-contacting parts SUS316, Teflon, Fluororubber
Connection method 9/16-18UNF, Rc 1/4", 1/4" Swagelok, 1/4" VCR
Mounting orientation Horizontal. Be sure that display surface does not face down.
Mass Approx. 1.2 kg
Applicable standards EN61326-2-3, EN61326-1
(To be used in an industrial electromagnetic environment)
During EMC testing, the reading or output may fluctuate by the
equivalent of ±10%FS.
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