华商宝

100-Series High Resistance Standards

LEADING MANUFACTURER - OVER 300 STANDARDS BUILT & DELIVEREDRESISTANCE FROM 1 MΩ TO 10 TΩNEW: IMPROVED TCR & VCRBPO OR TYPE N CONNECTORSHIGH IMMUNITY FROM ENVIRONMENTAL EFFECTSFULLY GUARDED – FOR ANY RATIO ON ANY MEASUREMENT SYSTEM

Ohm-Labs is the leader in guarded high resistance standards, the first to manufacture this design commercially, and the most experienced, wtih hundreds of these standards successfully built and delivered to labs around the world.

The 100-series guarded high resistance standards are designed for laboratory or on-site calibration use. Their low coefficients of temperature allow them to be used in a variety of environments without loss of accuracy. Hermetically sealed construction provides immunity from changes in barometric pressure and relative humidity. They are not affected by moderate vibration or shock. Low reactance allows their use as DC or AC standards. All models are housed in a rugged, die-cast aluminum case.

Connection is via either male silver plated British Post Office (BPO) plugs or type N jacks (specify at time of order). The shields are for a guard circuit driven at measurement potential. Either terminal may be high. BPO adaptors are available.

The guards are internally connected by a high value resistor nominally equal to the standard. This provides balanced guard voltages for any type of measurement system at any ratio.

A 5-way insulated binding post for banana plugs or spade lugs is provided for grounding the case.

A 10 K (nominal, at 25 °C) thermistor is included to monitor the internal temperature of the standard. Connection is via standard 2 mm banana plugs.

Optional accessories include BPO to BNC adaptors (male or female), and BPO to BNC adaptor cables. Decade resistance values are standard; other values are available on request.

All models include ISO17025 accredited calibration at two voltages and temperature coefficient determination.

Model Number	Nominal Resistance	Initial Tolerance in ppm	Temperature Coefficient (less than)	Voltage Coefficient (less than}	6 month Stability	12 month Stability	Recom. Voltage
Smaller case size models
106-H	1 Meg	5	1 ppm / °C	0.1 ppm / V	<3 ppm	<5 ppm	10
107-H	10 Meg	10	10	0.1	5	10	20
108	100 Meg	20	20	0.1	10	20	50
109	1 Gig	35	30	0.1	15	25	100
110	10 Gig	50	35	0.1	25	50	100
Larger case size models
111	100 Gig	200	50	0.2	50	100	200
112	1 Tera	500	50	1	100	200	500

NotesTolerance is at time of manufacture.Temperature coefficient is at nominal 23 °C +/-5°C.Voltage coefficient is at recommended –50 % / +100 %Max V: 106 1 kV, 107 3 kV, 108-110 10 kV, 111-113: 15 kV10 teraohm and above models are pending product redesignPhysical106-110: 178 x 75 x 100 mm / 7" x 3" x 4"; 1.5 Kg / 3#111-113: 228 x 125 x 125 mm / 9" x 5" x 5"; 2.5 Kg / 5#AccessoriesBPO female to BNC (M or F) adaptor1 m cables: BPO F to BNC