3
1. Technical specifications
Measuring ranges
Conductivity * 0.01 µS/cm to 199.9 mS/cm
* with C=0.1 cm -1 cell
°C –20.0 a 150.0
Measuring error
Conductivity
≤
1% (±1 digit)
Temperature
≤
0.5°C (±1 digit)
Reproducibilidad
Conductivity ±0.1% (±1 digit)
Temperature ±0.1°C (±1 digit)
Automatic temperature compensation
With temperature probe Pt 1000 or by keypad
Temperature coefficient, TC
Fixed at 2 % / °C
Reference temperature, RT
Fixed at 25 °C
Accepted cells
2 pole-cell. Constant between 0.05 and 50 cm-1
Recognised standards
147 µS/cm, 1413 µS/cm and 12.88 mS/cm
(25°C)
Calibration possibilities
With 1 or 2 standards
Access code: 100
Accepted calibration, 2 standards
Diference <30 % between the obtained cell
constants
Control mode
ON / OFF.
A relay programmable as maximum or minimum
Activation relays lag 2 seconds
Alarm relay programmable between 1 and 99 ss,
min or hours
Language
English, German, Spanish, French, Italian, Portuguese
Key pad
LCD, alphanumeric, backlit,
2 lines of 16 characters
Inputs and outputs
2 pole cell, terminal strip
Pt 1000 ATC, terminal strip
Analogic output, galvanically isolated:
• 4 to 20 mA for measurement (R max.= 500
Ω
)
• 21 mA or the last mA value measured for the instru-
ment in hold
• 22 mA for the alarm
Relés
1 limit relay, with no potential. NO contact.
1 alarm relay, with no potential. NC Contact.
Maximum load:
en CA < 24 V / < 3 A / < 72 VA
Maximum cable length
≤
25 m
Power supply
230 or 24 VAC ±10 %, 45-65 Hz,
(115 VAC under demand)
Consumption 4 VA
Protection: Class II
Overvoltage category: II
EC Directives
Electrical security according to 2006/95/EC
Electromagnetic compatibility according to
2004/108/EC
Environmental conditions
Working temperature: 0 to 50 °C (32 to 122 °F)
Storage temperature: –20 to 65 °C (–4 to 149 °F)
Relative humidity < 80 % (non condensing)
Max. height 2.000 m. at 230 V; 3.000 at 24 V
Enclosure
si628 C (wall mount): Thermoplastic material,
protection IP55. Flame rating HB
si628 C (panel mount): Noryl,
protection IP54. Flame rating FV-1
Weight
si628 C (wall mount): 700 g
si628 C (panel mount): 600 g
Dimensions
si628 C (wall mount):
105 x 170 x 100 mm (4 x 6.7 x 3.9 in.)
si628 C (panel mount):
96 x 96 x 100 mm (3.8 x 3.8 x 3.9 in.)
Warranty
Instruments: 2 years
Specifications are subject to change without notice.
ENGLISH
si628 C_HACH LANGE_Ed. 0510.indd ANG:3
si628 C_HACH LANGE_Ed. 0510.indd ANG:3
20/5/10 11:08:40
20/5/10 11:08:40
