Precision Resistor Company :: BALCO Tracking Chart TCR Characteristic in ppm/°F.

BALCO Tracking Chart TCR Characteristic in ppm/°F.

°F	ohms	ppm/°F	chg.	°F	ohms	ppm/°F	chg.
32	918.53			33	920.60	2121	2.154
34	922.71	2122	2.155	35	924.79	2124	2.157
36	926.86	2126	2.159	37	928.98	2127	2.160
38	931.07	2129	2.162	39	933.19	2130	2.163
40	935.28	2131	2.165	41	937.41	2132	2.166
42	939.51	2134	2.168	43	941.65	2135	2.169
44	943.75	2137	2.171	45	945.89	2138	2.172
46	948.00	2140	2.173	47	950.12	2142	2.175
48	952.27	2143	2.176	49	954.39	2145	2.178
50	956.54	2146	2.179	51	958.67	2148	2.181
52	960.80	2150	2.183	53	962.96	2151	2.184
54	965.10	2152	2.186	55	967.26	2153	2.187
56	969.43	2154	2.188	57	971.58	2156	2.190
58	973.73	2158	2.192	59	975.89	2160	2.194
60	978.06	2161	2.195	61	980.23	2163	2.197
62	982.41	2164	2.198	63	984.58	2166	2.200
64	986.77	2167	2.201	65	988.95	2169	2.203
66	991.14	2170	2.204	67	993.32	2173	2.206
68	995.51	2173	2.207	69	997.71	2174	2.208
70	1000.00	2174	2.207	71	1002.11	2178	2.212
72	1004.31	2179	2.213	73	1006.51	2182	2.216
74	1008.73	2183	2.217	75	1010.94	2185	2.219
76	1013.16	2187	2.220	77	1015.38	2188	2.222
78	1017.60	2189	2.223	79	1019.83	2192	2.226
80	1022.05	2191	2.225	81	1024.28	2192	2.226
82	1026.52	2194	2.228	83	1028.75	2195	2.229
84	1031.01	2198	2.232	85	1033.24	2198	2.232
86	1035.50	2201	2.236	87	1037.74	2201	2.235
88	1039.98	2202	2.237	89	1042.24	2204	2.239
90	1044.49	2205	2.240	91	1046.77	2208	2.242
92	1049.02	2208	2.242	93	1051.27	2209	2.243
94	1053.57	2212	2.246	95	1055.85	2214	2.248
96	1058.11	2215	2.249	97	1060.38	2216	2.250
98	1062.69	2218	2.253	99	1064.97	2219	2.254
100	1067.24	2220	2.255	212	1342.72	2388	2.420

TEMPERATURE COEFFICIENT OF RESISTANCE (TCR)

• The TCR equals the change in resistance times 1,000,000 (10⁶) divided by the original resistance (R_o) times the change in temperature.

• The TCR Char. is calculated between 25°C. and 100°C., always using +25°C.(77°F.) as the base temperature in the equation:

TCR/°F. = R212°F. - R77°F. / R77°F. x 135 x 10⁶
= 1342.72 - 1015.38 / 1015.38 x 135 x 10⁶
= 2388 ppm/°F. TCR/°C. = R100°C. - R25°C. / R25°C. x 75 x 10⁶
= 1342.72 - 1015.38 / 1015.38 x 75 x 10⁶
= 4298 ppm/°C.