7-3
Chapter 7. SPECIFICATIONS
Model No.
Item
MQV9005 MQV9020
Flow rate
display
Display method 7-segment LED, 4 digits
Setup resolution
Gas type and control range (P.7-11)
Indication accuracy
(at standard temperature and
differential pressure)
±1 %FS ±1 digit
Totalizing
function
Display range 0.0 to 9,999,999.9mL 0.00 to 99,999,999 mL
Display resolution 0.1 mL 1 mL
Totalized count backup timing (1) Every 50 mL (1) Every 200 mL
(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 the range).
Accuracy ±0.3 %FS (Total output accuracy: Indication accuracy ±0.3 %FS)
External 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 0.1 mL/1 pulse 1 mL/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 terminal 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 contact resistance 250 Ω max.
Allowable OFF contact
resistance
100 kΩ min.
Allowable ON residual voltage 1.0 V max. (open collector type)
Allowable OFF leakage current 50 µA max. (open collector type)
Reference
voltage
output
Output rating 5.0 V DC ±5 %, 5mA max.
Application Reference voltage of flow rate setting voltage and 5V input of external
3-way switching input
Communications
Mode Dedicated loader communications
RS-485 communications (3-wire system)
*7
*8
Transmission speed 2400, 4800, 9600, 19200, 38400 bps
(loader communications: 19200 bps only)
Power Rating 24 V DC, current consumption: 300 mA max.
Allowable power voltage range 21.6 to 26.4 V DC (ripple 5 % max.)
Isolation The power circuit is isolated from the input/output circuit.
Material of gas-contacting parts SUS316, Teflon, Fluororubber, borosilicate glass, silicone
Connection method 1/4" Swagelok, 1/4" VCR
Mounting orientation Horizontal. Be sure that display surface does not face down.
Mass Approx. 1.1 kg
Applicable standards EN61326-2-3: 2013, EN61326-1: 2013
(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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