Prix FOB
Obtenir le dernier prix|
1 Set Minimum Order
Pays:
India
N ° de modèle:
DFP-RM
Prix FOB:
Localité:
India
Prix de commande minimale:
-
Commande minimale:
1 Set
Packaging Detail:
1 set
Heure de livraison:
6-7 Weeks
Capacité de Fournir:
10 Set per Month
Payment Type:
-
Groupe de produits :
Personne àcontacter Ravi
452 Adarsh Nagar, ROORKEE
We offer Four Probe Method is one of the standard and most widely
used method for the measurement of resistivity. In its useful form,
the four probes are collinear. The error due to contact resistance,
which is significant in the electrical measurement on
semiconductors, is avoided by the use of two extra contacts
(probes) between the current contacts. In this arrangement the
contact resistance may all be high compare to the sample
resistance, but as long as the resistance of the sample and contact
resistance's are small compared with the effective resistance of
the voltage measuring device (potentiometer, electrometer or
electronic voltmeter), the measured value will remain unaffected.
Because of pressure contacts, the arrangement is also specially
useful for quick measurement on different samples or sampling
different parts of the sample.
The experiment consists of the following:
1. Probes Arrangement, FPA-RM:
The probes arrangement is mounted in a suitable stand, which holds
the sample plate and RTD (A class) sensor.
2. PID Controlled Oven, PID***0
Temperature Range: Ambient to **0°C  Â
Resolution: 0.1°C
Short Range Stability: ±0.2°C   Â
Long Range Stability: ±0.5°C
Measurement Accuracy: ±0.5°C (typical)
Oven: Specially designed for Four Probe Set-Up
Display: 3½ digit, 7 segment LED with autopolarity
3. Constant Current Source
a) Constant Current Source, Model : CCS**1
(for low resistivity samples)
The current source is suitable for the resistivity measurement of
low to medium resistivity samples such as thin films of metals/
alloys and semiconductors like germanium.
Specifications
Open Circuit Voltage: *2 V
Current Range: ***0mA, ****0mA
Resolution: *0μA
Accuracy: ±0.*5% of the reading
Display: 3½ digit, 7 segment LED
Load Regulation: ±0.1% for 0 to full load
Line Regulation: ±0.1% for *0% changes
b) Low Current Source, Model : LCS**2
(for high resistivity sample)
This current source is especially suitable for the resistivity
measurement of polymer ceramics and Si crystals.
Specifications
Open Circuit Voltage: *5V
Current Range: **2μA, ***0μA, ****0μA & **2μA
Resolution: inA at **2μA range
Accuracy: ±0.*5% of the reading ±1 digit
Display: 3½ digit, 7 segment LCD with autopolarity
Load Regulation: ±0.1% for 0 to full load
Power: 3 x 9V batteries
4. D.C. Microvoltmeter, DMV***1
Range: 1mV, *0mV, **0mV, 1V & *0V with **0%
over-ranging.
Resolution: 1μV.
Accuracy: ±0.2%.
Stability: Within ±1 digit.
Input Impedance: >***0M&branded; (*0M&branded; on
*0V range).
Display: 3½ digit, 7 segment LED with auto .polarity and
decimal indication
The experiment complete in all respect
| Pays: | India |
| N ° de modèle: | DFP-RM |
| Prix FOB: | Obtenir le dernier prix |
| Localité: | India |
| Prix de commande minimale: | - |
| Commande minimale: | 1 Set |
| Packaging Detail: | 1 set |
| Heure de livraison: | 6-7 Weeks |
| Capacité de Fournir: | 10 Set per Month |
| Payment Type: | - |
| Groupe de produits : | Physics Laboratory Instrument |
