2 specifications, 2 specifications -2 – Yokogawa PH72 Personal pH/ORP Meter User Manual
Page 9
IM 12B03D02-01E
1-2
1. Outline
1.2 Specifications
Measuring range:
pH:
0 to 14 pH*
1
ORP:
-2000 to 2000 mV
Temperature:
0 to 100
؇C*
2
Resolution:
pH:
0.01 pH
ORP:
0.1 mV (-199.9 to 199.9 mV)
1 mV (-2000 to -200 mV and 200 to 2000 mV)
Temperature:
0.1
؇C
Repeatability (without sensor):
pH:
؎0.01 pH ؎1 digit
ORP:
؎1 mV ؎1 digit
Accuracy (Temperature):
؎0.7؇C (0 to 70؇C)
؎1؇C (above 70؇C)
Temperature compensation (glass electrode emf — temperature characteristics):
Automatic compensation (or manual compensation*
1
)
Solution temperature:
0 to 80
؇C (or 0 to 100؇C*
3
) (0 to 50
؇C when a KCl replenish-
free type sensor and its sensor cable are immersed in water)
Solution conductivity:
50
S/cm or more
Ambient temperature:
0 to 50
؇C
Construction:
Protection class IP67 (IEC 60529)
Power source:
2x AA batteries (LR6)
Auto power off function (time configurable: 1 to 120 minutes)
Battery life:
Approximately 600 hours*
4
of continuous use (battery type and
operating condition dependent)
Dimensions:
Approximately 150(H) x 61(W) x 42(D) mm (not including
connector part)
Weight:
Approximately 220 g (including batteries)
EMC Conformity Standards:
EMI (Emission)
EN 61326-1 Class B
Test Item
Electromagnetic radiation disturbance
Frequency Range
30 to 1000 MHz
Basic Standard
CISPR 16-1 and 16-2
T0101.EPS
EMS (Immunity)
EN 61326-1 Table 2 (For use in inductrial locations)
Test Item
No.
1
Electrostatic
discharge
Test Specification
Basic Standard
IEC 61000-4-2
Performance
Criteria*
* A: Normal performance within the specification limits:
±
20% of the measured value.
B: Temporary degration or less of function or performance which is self-recoverable.
** Display value may be affected by strong electromagnetic field.
A
4 kV (contact)
8 kV (air)
A
2.0 to 4.0 GHz,
3 V/m (unmodulated)
80% AM (1 kHz)
2
RF amplitude
modulated
electromagnetic field
IEC 61000-4-3
B**
80 to 1000 MHz,
10 V/m (unmodulated)
80% AM (1 kHz)
A
1.4 to 2.0 GHz,
10 V/m (unmodulated)
80% AM (1 kHz)
T0102.EPS
*1: Display range is from -2 to 10 pH.
*2: Display range is from-10 to 120
؇C.
*3: When a needle type or test tube size pH sensor is used.
*4: When alkaline batteries are used.